Chair mat



FIG. 1 is a perspective view of a chair mat according to a first embodiment of this invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines in FIG. 7 depict portions of the chair mat that form no part of the claimed design. 

CLAIM An ornamental design for a chair mat, as shown and described. 